211101222010121 has 4 divisors (see below), whose sum is σ = 211160536771200. Its totient is φ = 211041907249044.

The previous prime is 211101222010093. The next prime is 211101222010163. The reversal of 211101222010121 is 121010222101112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211101222010121 - 2¹⁴ = 211101221993737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211101222010121.

It is not an unprimeable number, because it can be changed into a prime (211101222010421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29657375201 + ... + 29657382318.

It is an arithmetic number, because the mean of its divisors is an integer number (52790134192800).

Almost surely, 2^{211101222010121} is an apocalyptic number.

It is an amenable number.

211101222010121 is a deficient number, since it is larger than the sum of its proper divisors (59314761079).

211101222010121 is an equidigital number, since it uses as much as digits as its factorization.

211101222010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59314761078.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211101222010121 its reverse (121010222101112), we get a palindrome (332111444111233).

Subtracting from 211101222010121 its reverse (121010222101112), we obtain a palindrome (90090999909009).

The spelling of 211101222010121 in words is "two hundred eleven trillion, one hundred one billion, two hundred twenty-two million, ten thousand, one hundred twenty-one".